IL21 ELISA kits are immunoassay tools for the measurement of the protein interleukin 21, which is encoded by the IL21 gene in humans. Functionally, this protein is known to be involved in viral immune response and germinal center B cell differentiation. The canonical protein structure is reported to have an amino acid length of 162 residues, a mass of 18.7 kDa, and is a member of the IL-15/IL-21 protein family. It is known to be secreted and is reported to be expressed in activated CD4-positive T-cells but not in CD8-positive T-cells, B-cells, or monocytes. As many as 2 protein isoforms have been reported. The protein has been noted to be post-translationally glycosylated. The IL21 gene has been associated with the disease, Immunodeficiency.
The detection range for different IL21 ELISA kits can vary, with some assays measuring target concentrations as low as 1.37 pg/mL and as high as 600 ng/mL. Click on the products below for more detailed ELISA kit information, such as target reactivity and assay sensitivity.